For many people, religion is deeply ingrained in their day-to-day existence. It supports their faith and spirituality, and it provides friendship and a sense of community.

But religion can also contribute to conflict, as in the Central African Republic, where Muslim and Christian groups are currently enmeshed in a violent struggle for power.

Psychological scientist Steven Neuberg of Arizona State University and colleagues wanted to examine what effect religious infusion — the degree to which religion influences the everyday lives of groups and their individual members — might have on intergroup conflict.

Their findings are published in the January 2014 issue of Psychological Science.

The researchers interviewed scholars with expertise in one of 97 countries encompassing about 124 different groups, each of which had the potential to be involved in a certain type of conflict involving a powerful ingroup and a marginalized outgroup, with groups including ethnic minorities, religious ruling classes, and dominant state powers.

In general, groups with higher levels of religious infusion were more likely to experience various types of conflict, including prejudice, interpersonal discrimination, individual violence, symbolic aggression (e.g., desecration of holy sites), and collective violence.

But religious infusion also interacted with two specific mechanisms — value incompatibility and competition for limited resources — to predict certain types of conflict.

Ingroups and outgroups with high religious infusion were prejudiced against — and were more likely to discriminate against — groups that held incompatible values.

But the picture was more complex for outgroups that had to compete with more privileged ingroups for limited resources.

Disadvantaged groups with low levels of religious infusion tended to avoid acting aggressively toward their powerful counterparts, whereas disadvantaged outgroups with high levels of religious infusion tended to engage more powerful groups with violence or aggression.